"He's doing a lot better," Will comments to Hailey a few weeks later on a rare Saturday that they all have off.

"Yeah, but he hides things well," Hailey tells the older Halstead as the two watch Jay throw a ball for Casper.

"What do your instincts tell you?" Will asks the blonde detective.

"About what?"

"About Jay. Do you think he's hiding something right now?"

"If he is, he's hiding it very good," Hailey states.

"If you're not seeing it, then I don't think he is," Will tells her. "You can read him like a book. You knew there was something bothering him, every time you know before he shows it. I had no idea what was happening."

"Will, he bottles things up until he spirals. If he's showing that something is bothering him, he's at a point where he's spiraling out of control. I just spend a lot of time with him at work."

"He's my brother, I should know him better. He should feel like he can come to me."

"If it makes you feel any better, he doesn't come to me. I force it out of him because I need to know that his head is on straight when we're at work."

Before Will can respond, Jay comes over with Casper. "Hey, I just got a text from Voight. We got a body."

"Okay, let's go."

"Do you want me to take Casper back to your place for you?" Will asks.

"Yeah, thanks," Jay answers as they walk back to the cars. Jay hands the leash off to his brother, "Go with Uncle Will," he tells his dog.

Arriving at the scene Hailey and Jay search for Voight when they are the first to arrive to the scene.

"What do we got, Sarge?" Hailey asks.

"Home invasion gone bad. According to the neighbors, the parents are out of town but the kids were home. Eighteen-year-old brother, Seamus, was watching the younger siblings: seven-year-old Declan and five-year-old Bridget. The younger ones are fine, scared but uninjured. Looks like older brother died protecting them, hid them in a closet, he has defensive marks on him."

Hearing that the case involves children Hailey looks over to Jay, silently asking if he's going to be okay since children are one of his triggers.

Jay nods, but his eyes don't say the same thing. Hailey makes a mental note to keep tabs on him while they are handling this case.

Seeing that the rest of their team has arrived Voight tells the two detectives, "Take the kids back to the district- see if you can get them talking and call DCFS. I'm going to catch the others up and then talk with the neighbors- see if they know anything else."

"Why call DCFS?" Jay asks.

"Immigrant family. Parents when back to the home country to sort something out. No other family in the country let alone Illinois."

Before Jay can question their boss again, Hailey grabs his arm and pulls him over to the kids.

Going up to the two kids sitting on the back of the ambulance Hailey introduces themselves to the scared kids, "Hi. My name is Hailey and this is my friend Jay. We're the police. Do you want to see a police station."

The two kids look at each other scared before the boy nods his head. After they get the clear from Brett and Foster to take the kids, Hailey grabs on to a hand on each child and walks them to Jay's truck.

Getting them into the back seat she warns Jay, "Drive carefully. These kids should be in car seats."

"I'm a good driver," Jay says feigning hurt while getting into the driver's seat.

After a careful drive, Jay gets them to the Twenty-First District. Hailey and Jay bring them into the breakroom of the Intelligence Unit. Sitting them at the small table Jay asks, "Did you see what happened?"

The two remain quiet and Hailey gives him an incredulous look. "Jay," she scolds. "Don't start with that." Hailey turns her attention to the young siblings, "Do you have a favorite animal?

The two remain silent, causing Jay to give her a look saying you didn't do much better. The two take turns asking random questions trying to get the children to open up.

After a long fifteen minutes, Jay turns to Hailey, "This isn't working. I have an idea."

"What? I'm down for trying anything at this point," Hailey tells him.

"I'm going to run home and get Casper. See if having him here will get them to open up," Jay tells her.

"I don't think Voight will go for it," Hailey warns him.

"At this point, it's better to beg for forgiveness than ask permission," he tells her while grabbing his keys.

"Fine, but you're the one explaining this to Voight," Hailey tells him as he walks out of the room.

"Casper, come here boy," Jay calls for the dog as he opens his apartment door. Casper is happy to see Jay and goes straight to him. Jay clips on his leash, taking off the leash wrap before leading him out of the apartment.

Jay loads Casper into the back of his truck for the ride back to the district.

Arriving back at the district, Jay gets Casper out of the truck. As soon as he steps foot into the building, he is greeted by the voice of the desk sergeant, Platt. "Chuckles, what is that animal doing in my precinct?"

"It's Detective Chuckles and the two kids from the home invasion, we can't get them to talk- at all. I'm hoping that they will start talking about something if I bring Casper in," Jay tells her.

Platt softens when she hears about the children not speaking, but can't help making one more remark at Jay, "Casper? Like the carton ghost? Wouldn't expect something so…" she makes a vague hand gesture not knowing how to describe what she wants to say, "as a name from you."

"He had the name when I got him," Jay calls back as he is walking towards where the Intelligence Unit is.

"Jay, why is your dog here?" Ruzek asks, bringing attention to the two.

"The kids have been completely mute since we brought them back here. I was hoping that Casper could get them to talk," Jay explains when Voight looks at him.

"Worth a try," Voight comments, having a soft spot for children.

Jay takes Casper into the breakroom where Hailey still is with the kids. Jay notices Bridget's eyes light up when she sees the yellow lab. "This is my dog, Casper. Do you like dogs?"

Declan nods.

"Do you want to pet him?"

Bridget looks to Declan before nodding.

"Go ahead," Jay encourages.

"Where's Seamus?" Declan whispers as he and his sister are petting Casper.

"Did you hear anything this morning?" Hailey asks, not knowing how to tell two children that their brother was dead.

"No, Seamus hid us in a closet and told us not to come out," Declan tells the detectives.

"Do you know when your parents are going to be back?" Jay asks.

"Tomorrow," before Declan can say anything else, Ruzek appears at the door.

"Sorry, DCFS is here."

"What's happening?" Bridget speaks for the first time.

"Until your parents get back, DCFS is going to take you somewhere to stay."

"Why can't we stay with Sea?" she asks.

"He can't take care of you right now."

"I need to take the kids with me now," the DCFS worker tells them.

"Okay, until we figure out what happened, they need to go in protective custody," Hailey tells him.

"We have a few homes for that."

"Thanks."

"This is going nowhere," Jay complains at his desk rubbing at his temples after five hours of nothing. Casper sits up from his spot under Jay's desk and places his head on Jay's leg. Voight having let Casper stay as long as he didn't get in the way.

"Alright everyone, call it a night. Come back in the morning with fresh eyes," Voight tells them.

"Anyone up for Molly's?" Ruzek asks.

Everyone gives different variations of yes after the day they've had.

"I'll meet you there after I take Casper home," Jay tells the rest of the team.

"Are you sure you're coming?" Adam asks.

"Yes, I just need to take Casper home," Jay tells him before leaving with Casper.

"I don't think he's showing," Adam comments to the rest of the unit after waiting on Jay for forty-five minutes.

"Have you heard from him?" Vanessa asks Hailey.

"No. I've texted him, but haven't gotten an answer yet," Hailey answers.

"Do you think he's okay?" Kim asks concerned for her teammate.

"He seemed okay. I can usually get a good read off of him, nothing seemed off," Hailey answers.